Ball retriever head assembly



FIG. 1 is a perspective view of a ball retriever head assembly embodying our new design, with a handle used therewith shown in phantom line for illustrative purposes only;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front (or rear) elevational view thereof;

FIG. 4 is a bottom view thereof; and

FIG. 5 is a top view thereof. 

The ornamental design for a ball retriever head assembly, as shown and described. 